Note 16 - Due to New Investors Related to Terminated Security Purchase Agreements (Details Textual)	6 Months Ended		12 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	May 12, 2016
Number of Investors Security Purchase Agreement Terminated					2
Repayment for Security Purchase Agreement	$ 957,000		$ 0	$ 0
Security Purchase Agreement Termination Failure to Refund Amounts Annualized Interest Rate for Unpaid Amounts			12.00%
Jinrun Fangzhou [Member]
Common Stock Purchase Agreement Guarantee Payments Initial Payment Due Within Five Days Percentage			10.00%
Common Stock Purchase Agreement Guarantee Payment Due Within Thirty Days, Percentage			15.00%
Common Stock Purchase Agreement Guarantee Payment			$ 819,000
Dongsys Innovation [Member]
Common Stock Purchase Agreement Guarantee Payments Initial Payment Due Within Five Days Percentage			10.00%
Common Stock Purchase Agreement Guarantee Payment			$ 119,000